ul{
    padding: 0;
    margin: 0;
    list-style: none;
    bottom: 0;
    text-decoration: none;
}
.images-lun{
    width: 500%;
    height: 100%;
    display: flex;
    position: absolute;
    left: 0%;
    /* transition: .2s; */
    /* 设置过渡效果 */
    transition: opacity .2s ease-in-out;
}
.img-lun{
    width: 100%;
    background-size: cover;
    /* 淡入淡出效果 */
    transition: opacity .2s ease-in-out;
}
.img-lun:nth-child(1){
    background-image: url(../img/1.jpg);
}
.img-lun:nth-child(2){
    background-image: url(../img/2.jpg);
}
.img-lun:nth-child(3){
    background-image: url(../img/3.jpg);
}
.img-lun:nth-child(4){
    background-image: url(../img/4.jpg);
}
.img-lun:nth-child(5){
    background-image: url(../img/5.jpg);
}
.min{
    display: flex;
    justify-content: space-evenly;
    position: absolute;
    bottom: 20px;
    width: 30%;
    z-index: 999;
    left: 50%;
    transform: translateX(-50%);
    /* left: 50%; 将元素的左边缘定位到父元素的中点。
然后，transform: translateX(-50%); 将元素自身向左移动一半的宽度，从而使整个元素居中于父元素。    */
}
.m{
    width: 10px;
    height: 10px;
    /* 这个属性用于指定当用户将鼠标指针悬停在该元素上时，光标的样式会更改为手指形状 */
    cursor: pointer;
    border-radius: 50%;
    border: solid rgba(255,255,255,0.5) 5px;
    background-color: #fff;
}
.button-lun{
    width: 100%;
    height: 100%;
    position: absolute;
    display: flex;
    justify-content: space-between;
    /* 这个属性用于控制用户是否可以选中元素的文本。 */
    user-select: none;
}
.button-left,.button-right{
    font-size: 50px;
    /*background-color: rgba(160,193,255,0.2);*/
    padding: 0 20px;
    cursor: pointer;
    line-height: 247px;
    color: #fff;
}